Streetdirectory.com Oasis @ Sakra is located in Jurong Island Singapore, an island off the mainland. Created by connecting 7 islands, Jurong Island is the centre of the chemical process industry in Singapore. It is also the home of petrochemical engineering companies like ExxonMobil and Shell oil, whose interest in Singapore sparked the development of the district. Set up by Jurong Town Corporation, or JTC, the industries here convert crude oil into plastic and petroleum. Jurong Island is a restricted area and you will need permission to enter this location. Permission by be obtained by getting invitations from companies in that location.